AAP govt set to replace satellite imaging with real-time surveys

The Aam Aadmi Party (AAP) government has decided not to use satellite images in determining boundaries of what are called unauthorised colonies – which has proved to be a bottleneck for years in their regularisation – and instead go in for real-time surveys, officials said.

After the government found that satellite images lacked accuracy in determining the boundaries, the Arvind Kejriwal government has employed Total Station Machine (TSM) Survey for the task – a method officials describe as "more accurate and reliable".

Following irregularities in the process of authorising such settlements in 2012, the then Sheila Dikshit-led Congress government had asked the Survey of India to provide satellite images for verifying built-up areas in these settlements. 

"There were many problems in determining boundaries through satellite images. You cannot rely on satellite images when it comes to unauthorised colonies in Delhi," a government official said.

"TSM is more of a manual method. People engaged in surveying will go to these colonies with equipment. It is an important step. You cannot progress in regularising colonies till you demarcate their boundaries," he added. "The good part is that people engaged in the survey will visit these colonies," he said.

In the method, an electronic or optical instrument theodolite, used in modern surveying and building construction, as it can measure slope distance, vertical angle, and horizontal angle from a set-up point to a foresight point is employed. 

"Two private agencies had been hired to do this. It will be first used in the 895 <g data-gr-id="26">unauthorized</g> colonies notified for regularisation," the official said.